What are the mysql processes clogging up all the memory?

Question

linux

Made a webserver on simplecloud. Didn't set anything other than the bare minimum. After a reboot, for about 10 minutes, the memory is clogged with some kind of Mayskl processes almost back to back.

what are these processes and who starts them. at first it seemed that they kind of release memory when it is needed, but it turned out that they didn’t

Answer 1

These are not processes, but threads. MySQL uses threads to process incoming connections from clients. Most likely, you are using persistent connections - the client code does not close the connection after executing the SQL query. This is normal practice.
It is unlikely that the memory is occupied by servicing these threads / client connections, MySQL usually spends memory mainly on the InnoDB buffer pool (for MyISAM - key cache). It makes no sense to give back the memory occupied by the buffer pool or key cache, it is used to service all client requests.

Answer 2

is included in the list of the most necessary mysql? look at its settings.